Page 68 - steps 4b 02.pdf

RM75

II Volume and Capacity (2) II II II II 4b:32
e

Estimating millilitres An activity for 2 people

You need: 2 litre container (not calibrated) filled with water; empty transparent
containers; measuring cylinder (or jug) with 10 ml calibrations; funnel

The equal divisions marked on
OJ Each of you puts what you estimate to be rulers, bathroom scales, jugs and
100 ml of water in an empty container. other measuring instruments are
Don't use the measuring cylinder. called calibrations. ~
:y.j :~~~~~
[!] Check your estimate by measuring the amount <:<--~ }f.g~~lJf!l
to the nearest 10 ml in the measuring cylinder. :1 j ( , ; ~.

~~. ~;
~ On this table, record the amount of water.
Work out the difference between it and 100ml. o~h'.

1 st try 2nd try 3rd try 4th try

Amount of water (nearest 1 0 ml)

Difference between
100 ml amount of water and 100 ml

~ Put the water back in its container and try again 3 more times.

[!] Repeat stages IT! to ~ for these amounts.

1 st try 2nd try 3rd try 4th try

Amount of water (nearest 10 ml)
500ml
Difference between
amount of water and 500 ml

1 st try 2nd try 3rd try 4th try

750ml Amount of water (nearest 10 ml)

Difference between
amount of water and 750 ml

o Did your estimates get better with practice?
o What fractions of a litre are 100 ml, 500 ml and 750 ml?
e 0 What other fractions of a litre do you know?

Estimating and measuring amounts
Name
to the nearest 10 mi.
Date

© 1994 HarperCollins Publishers STEPS 4b